| 摘要 |
Disclosed is a zoom lens having a vibrationproofing function capable of maintaining an excellent small-sized optical performance while obtaining an enough zoom ratio by including a wide angle area. The zoom lens comprises a first positive lens group, a second negative lens group, and a third positive arranged from an object in order. In case of zooming the wide angle to telephoto, a gap between the first positive lens group and the second negative lens group is widened and a gap between the second negative lens group and the third positive lens group is narrowed. The second lens group comprises a 2a negative lens group and a 2b negative lens group arranged from the object in order. The present invention can perform a vibrationproofing function by varying the 2b lens group in a vertical direction to an optical axis. |
